MBNL1 and myotonic dystrophy type 1: Thus, we established three splicing events typically altered in DM1 as screening criteria for the 15 d-amino-acid hexapeptides previously identified (Supplementary Table 1)22: the inclusion of exon 5 of cardiac troponin T gene (cTNT; Entrez ID: 7139) and the exclusion of exon 78 of the dystrophin gene (DMD; Entrez ID: 1756), both MBNL1-dependent and the exclusion of exon 23 of spectrin alpha non-erythrocytic gene (SPTAN1; Entrez ID: 6709), which is MBNL2-dependent27.